The α-histogram: Using Spatial Coherence to Enhance Histograms and Transfer Function Design

IEEE/EG Symposium on Visualization, page 227--234 - 2006
Download the publication : Lundstrom_et_al.2006-The_a-Histogram-_Using_Spatial_Coherence_to_Enhance_Histograms_and_Transfer_Function_Design.pdf [1.2Mo]  
The high complexity of Transfer Function (TF) design is a major obstacle to widespread routine use of Direct Volume Rendering, particularly in the case of medical imaging. Both manual and automatic TF design schemes would benefit greatly from a fast and simple method for detection of tissue value ranges. To this end, we introduce the a-histogram, an enhancement that amplifies ranges corresponding to spatially coherent materials. The properties of the a-histogram have been explored for synthetic data sets and then successfully used to detect vessels in 20 Magnetic Resonance angiographies, proving the potential of this approach as a fast and simple technique for histogram enhancement in general and for TF construction in particular.

BibTex references

  author       = {Lundstr{\"o}m, Claes and Ljung, Patric and Ynnerman, Anders},
  title        = {{The \α-histogram: Using Spatial Coherence to Enhance Histograms and Transfer Function Design}},
  booktitle    = {IEEE/EG Symposium on Visualization},
  pages        = {227--234},
  year         = {2006}

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